Simon, I think you will have difficulty finding a 47 tooth gear commercially so it would have to be custom and pricey! I don't use the controller to goto as my gear runs off a computer which will simplify the mod gearing. Don't think there are any workarounds for it. I guess if there's enough of us we could try to find an IIS member with excellent lathing skills to center bore a small run of gears that could be made available to IIS members. That might work.
Stephen
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